Fire-extinguisher.



UNITED STATES rArENr oFFicE.

HAROLD J. cARivioDY, or NEW YoRx, N. Y., AssIGNoR or ONE-THIRD To JOSEPH M.

`LRVINE AND' ONE-THIRD To HARRY UFLAND, or NEW YORK, N. Y.

Specification of Letters Patent.

Application ineYaJu1y11,f1914. serial No. 850,518.

plish the following results :I. To render` the air pressure, used for ejecting the fire extinguishing liquid independent of the quantity of such extinguisher. II. To provide the -extinguisher with a pump of speciallform,so that it may serve the double purpose of forcingl the fire extinguishing liquid into the extinguisher and of creating within the ex- 1 tinguisher an air pressure for ejecting the liquid. III. To provide for reaching andI ejecting the liquid within the extinguisher,

even if only a small quantity be present. IV. To give the discharge outlet and parts immediately associated therewith such form and location as to enable the operator to vary, within wide limits, the character of.

the discharge. V. To provide the body portion of the extinguisher with a funnelshaped head for receiving the liquid and placing the same under control of the pump in order to enable the pump to force the liquid into the extinguisher. VI. To provide the pump, guisher mechanism, with a piston which is expanded positively vduring compression, and without having been previously moistened. VII. To provide the extinguisher with a number of improved parts, including a needle valve requiring no packing and no expanding -or jamnuts, and also a bayonet lock for normally holding the pump plunger in-a predetermined position relatively tothe pump barrel and adjacent parts.

Reference is made to the accompanying drawing forming a part of this specification, and in which like letters indicate like parts. Figure 1 is a side elevation of the ex tinguisher, certain parts being broken away. Fig. 2 is a substantially centrally vertical section through the extinguisher complete.

J. CARMODY, av

liquid contained within the forming a part of the extin- Fig. 3 i's a section on the line 3-3 of 2, looking in the direction of the arrow.

Patented Nov. 30, 1915,

A container having generally theform of Y a cylinderv is shown at 4, and serves as a casing or body member .for holding/ the other parts. The bottom of ythe container4 is closed by a head 5, the latter being provided with a rounded portion 5a, as may best be understood from Fig. 2.v y The upper'end of the container carries a top head' 6, having generally the form of a funnel, and

adapted to serve as such. Integral with the top head 6 is an annular flange 7 ,i which 'its neatlyfaround the adjacent end portion of ,the container. The top head 6 is of a generally annular form and carries a .barrel 8 which-'has a cylindrical form and is concentainer, and carries at its lower end a screw 'plug 9 provided withv a plunger seat; 10, the

, tric. with the container 4c.y The barrelf8 reaches nearly vto the bottom-,of the con-q latterbeing simply coredout-and ground. y

Ajcheck valve 11I is carried by the screw extend up into the plunger seat. A valve spring 12 engagesA the valve.11 and tends to or analogous support engages the spring 12. IA flexible duct` 14 having the form of a corrugated metallic tube is secured upon the lower end of the screw plug-9, which is reduced for this purpose as will be under- VAplug 9 and seated within thesame, so as to .Y

st oodfrom Fig. 2. In this manner the exible duct 14 is mounted upon the lower end of the barrel 8. The flexible duct may be bent by its own weight, whenever the container 4 is tilted to one side, and when the duct v14 is thus bent, it tends-.to hang into the portion of the container carrying any small quantity of liquid therein remaining. The container 4 is adapted to hold a quantity of lire extinguishing liquid 15, which may be, Y The upperv end'of the barrel 8 is fitted with a spider 16, the latter being provided with holes 17 for facilitating the introduction of the re extinguishing liquid.

l A pair of cleats 18' each of arcuate form are secured upon the top head 6 and disposed upon opposite sidesof the barrel 8. A plunger rod is shown at 19 and has a substantially tubular form. This plunger rod carries a rin'g 2O andV extending from opposite sides of this ring are two wings 21 for instance, carbon tetra chlorid.l

80 hold the latter againstits seat. A spider 13 of arcuate form. These wings are provided with inwardly extending portions 21a so positioned that they may extend into and slightly beneath the cleats 18, thus forming la so-called breech block joint or connection between the plunger rod 19 and the cleats 18. The plunger rod is provided with a portion 22 which is carefully ground and adapted to lit into the plunger seat 10. The lower end of the plunger rod 19 carries aspider 23, the latter being so positioned that when the plunger rod is in its lowermost position the spider 23 holds thevalve member 11 away from its seat, 'or in other words, holds the valve open.

Fitted loosely upon the plunger rod 19 is a sleeve 24 which is threaded externally. A corkuring 25 is fitted upon this sleeve. A leather cup 26 encircles the cork ring 25 and is held in position by aid of a nut 27. Another nut 28 like the nut 27 is mounted upon the sleeve 24. By turning these nuts 27, 28 any desired degree of pressure may be applied to the cork ring. The plunger rod 19 carries a snap ring 29 detachably secured to it .and located just above the ground portion 22. Another flange 30 ol"` annular form is carried by a sleeve 31, the latter encircling and being secured rigidly upon the plunger rod 19. A space 24a is provided between the upper end of the sleeve 24 and the adjacent surface of the flange 30, and the sleeve 24 loosely encircles the plunger rod 19. The sleeve 24, at its lower end, is provided with notches 24h. In any event, there should be room for a liquid to pass freely between the outer surface of the plunger rod 19 and the inner surface of the Sleeve 24. Encircling the plunger rod 19 is a gasket or packing 32 of leather, so located as to close the space between the sleeve 24 and the rod 19 whenever the plunger rod is raised.

The upper end of the plunger rod 19 is provided with a cylindrical casing 33, and extending through thisl casing is a passage 34. A needle 35 extends into4 this passage, and is provided with a. handle 36 whereby it may be turned. The needle is further provided with an enlarged threaded portion 37,

fitting into the adjacent end portion of the casing 33. The middle portion of the needle fits fluid-tight within the passage. The casing is also face 34, and the needle 35 carries a conical point 34b which fits into the conical inner surface 34a. The casing 33 is provided with a branch passage 34, which extends into the conical space adjacent thereto, as shown in F-ig. 1. An 'orifice 38 merges into the chamber 34, which is merely a clearance passage to avoid undue friction. The construction `or the casing 33 is such that the liquid can not enter the casing except through the branch passage 34, and is unable to escape provided with aj conlca-l inner surat the right according to Fig. 2, owing to the fluid-tight fit of the needle within the casing. The flow of liquid out of the orifice 38 is under complete control of the needle. The discharge may be given the form of either a stream or a spray, as de` sired, this purpose being facilitated by the fact that the needle valve, controlling the discharge, is located at the extreme point of exit of the liquid. The control of the discharge is thus rendered local, and, because of this fact the form of the discharge may be varied within wide limits. The,y operator by grasping the casing 33 and treating it as a handle can cause the tubular plunger rod 19 to reciprocate, and thus act as a pump plunger. By forcing it downward into its lowerlnost position the ring 20 is brought adjacent the cleats 18, so that the inwardly extending portion 2.1a of the sleeve 21 may, by a partial turn of the casing 33,be brought into engagement with the cleats 18, thus locking the plunger rod in its lowermost position.

Each time the plunger rod 19 is thus locked at the lower limit of its travel according to Fig. 2, the check valve 1l is engaged by the spider 23 and forced downwardly. lVhen the plunger rod 19 is locked in its lowermost position as above described, by the breech block connection, there is free communication between the interior of the container 4 and the interior of the tubular plunger rod 19. In other words, the check valve is open, and the liquid 15, which is normally under pressure, is free to travel upwardly through the tubular plunger rod 19, provided the needle valve 35 of the top is open. Therefore, the operator by' manipulating the needle valve can control the discharge of the liquid from the orice 38.

In order to introduce the liquid 15, a quantity of it is poured into the top head 6. serving as above described as a funnel. Upon the upstroke of the plunger 19 the liquid is by suction drawn down between the sleeve 24 and the outer surface of the plunger rod 19 and thus deposited within the lower portion of the barrel 8. The downstroke of the plunger causes the leather gasket 32 to lodge upon the upper end of the sleeve 24, so as to prevent the liquid nfrom flowing upwardly, and also .causes the stroke of the plunger rod the cylindrical passage 24a is left open. The lower end of the passage 24a is never closed, owing tothe presence of the Anotches 24". The cork ring 25. and leatherfcup 26 together constitute a packing such as may always be depended upon to t the interior of the barrel 8 under all conditions. If `the leather cup 26 or the c ork ring 25 be worn, for instance, or if they be dry, they will nevertheless fit fluid-tight, and even air tight, as soon as liquid and said air into said container, said the plunger rod 419 makes one or two strokes.

This is because the leather, cup 26 isacted upon vby the liquid, or vby the compressed air, as the case may be, and thus expanded positively .to t the interior of the pum barrel.

As may be readily understood, rom the foregoing description, the filling ofthe eX- tinguisher with place through the pump. The needle valve 4vcontrol Vof the discharge enables the character of the discharge to be varied, say to form a stream or a spray, at the will of the operator. The funnel shaped head 6 facilitates introduction of the liquid by aid of the e pump. `The needle valve, because of its form, requires neither packing, expansion.

nuts nor jam nuts. The bayonet lock, consisting of the parts 18, 21 and 21s,'normally holds the pump plunger most position. If, now, tion of the liquid as just described, orA at any other time, the plunger rod '19 be reciprocated by hand as above described, the

device works as an air pump, and 4forces compressed air into the container. Even if the container hasvery little of the liquid in it, the air pressure mayA nevertheless be produced as desired.. For purposes of the the cork. ring 25 and leather cup 26v together serve the purpose of a valvular pis- Pump;

ton.

I do not limit myself to the precise construction shown, as variations may be made therefrom without departing from the spirit of my invention.

sov

Havingthus describedinvention, I

of a container provided with an inwardly A 'cupped' head serving as afunnel for holding a liquid, a pump secured to said head and extending into said 4container for the either liquidor air takes' rigidly in its lowernormally holding said plunger through said pump, by pressure of said air within saidf`container. Y'

2. In a re1 extinguisher the combination of a container for holding a liquid and a volume of air under pressure, a pump extending into said container for filling said pump being provided with a hollow plunger I i rod and handle, and a needle valve carried by said handle for discharging the liquid from said container in theform of a stream or a spray, as desired.

3. In a re e'xtlnguisher the combination` 1ofav container provided with an inwardly cupped head serving as a funnel for holding a liquid, a pump extending 'into said container and'connected with said head for the purpose Vof receiving the liquid' from the funnel and forcing the same into said container, said pump also serving as an air pump for compressing air and forcing the same into said container if Aoperated. while said funnel is empty, said pump having a movablel plunger, and a bayonet ]oint for in a prede- .termined fixedr position relatively to container.

, 4. In a fire extinguisherlthe combinatiom of a container provided with a member serving as a funnel for holding a liquid,apump extending into said container and. connected with said funnel for receiving the liquid fronithe funnel and forcing the same' into said container, said pump also serving -as an air pump for compressing air and forcing the same into said container if operated while said funnel is empty, saiY ing a movable plunger of tubular form and a handle mounted upon lsaid plunger for actuating the same, and a needle valve carried by said handle for controlling a discharge of liquid from. said container, said needle valve being made entirely of metal..

HAROLD i. CARMODY.

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